JP3399140B2 - Ventilation equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device for realizing ventilation with a constant air volume.

[0002]

2. Description of the Related Art A ventilation system for ventilating a plurality of rooms such as bathrooms and toilets in a house by a single blower is conventionally performed by using a blower having a single exhaust structure and a plurality of intake structures. There is. That is, a plurality of intake structures of such a blower are individually connected to each room of the house by ducts. With this, if the ventilation capacity of each duct is taken into consideration and the capacity of the air blower is determined to be optimal, each room will be able to obtain the optimal ventilation volume, and the layout will be the same for all houses. Then, such a blower can be applied to any house. However, many houses have different configurations and layouts, and the length of the duct and the number of bent points also differ, so even if the ventilation resistance of the duct is taken into consideration in advance, the optimal capacity of the air blower can be determined. Ventilation is difficult to obtain.

As a ventilation technique which can cope with individuality of a house, for example, there is one disclosed in JP-A-1-239330. This is a system in which the total ventilation is set by the exhaust side of the blower, and the individual ventilation is set by each intake side.A pressure sensor is installed on the exhaust structure side of the blower to detect wind pressure. Has been. The output of this pressure sensor is input to the wind pressure change rate measuring means, and the wind pressure change rate measuring means measures the change rate of the wind pressure from the preset reference wind pressure and the output of the pressure sensor, and outputs it to the exhaust air flow rate determining means. The exhaust air volume determination means determines the exhaust volume from the rate of change of the wind pressure, and controls the blower device by the blower drive means.

A ventilation device that enables such ventilation is
Since the air blower requires agile control, its control circuit has a fairly complicated structure, including an inverter circuit.
Conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open No. 57-119224, a device for incorporating the ventilation device into the main body has been devised. That is, as shown in FIG. 8, the pressure detector 101 as the detection unit in the control system is the blower 10
Since it is necessary to detect the pressures of the suction side and the blowing side of No. 2, the pressure detecting ports are arranged close to both the suction port 103 side and the blowing port 104 side of the blower device 102, and the pressure detecting ports are respectively the suction port 103 of the blower device 102. Side and the outlet 104 side. Although not shown in FIG. 8, the control circuit is also mounted on the inner surface of the main body adjacent to the pressure detector 101.

[0005]

Many of the conventional ventilation devices as described above are mounted in a relatively narrow space under the ceiling, and therefore the pressure detector 1 is strongly required to be miniaturized.
01 and the control circuit make it difficult to cope with miniaturization. Further, since the pressure detector 101 and the control circuit are exposed to the intake air, a failure caused by moisture contained in the intake air is likely to occur. Especially when the control circuit includes an inverter circuit, the control circuit itself tends to be bulky and
Problems due to moisture are also likely to occur.

The present invention has been made to solve the above-mentioned conventional problems. The problem is that the main part of the control system is housed in a control box and externally attached to the main body. The goal is to obtain a ventilation system that can be downsized and avoid control failures, and to improve the assembly and assembly of the system as well as the installation and maintenance. Is to be small.

[0007]

In order to achieve the above object, the invention of claim 1 is provided with a pressure sensor for detecting the pressure difference between the upstream side and the downstream side of the intake air passage, and this pressure sensor detects the pressure difference. For a ventilation device that is configured to control a blower so that the pressure difference matches a preset target value, a mounting surface is configured on a part of the outer surface of the intake structure for the blower, and the pressure is applied to this mounting surface. A detection hole for detecting the difference is opened, and a control circuit for controlling the blower and a pressure sensor are housed in a control box that is detachably configured on the mounting surface, and on the contact surface facing the mounting surface of the control box, A means for arranging a detection port for pressure detection, which communicates with the pressure sensor, and mounting the control box on the mounting surface so that the detection hole has a functional connection state, is adopted.

To achieve the above object, a second aspect of the present invention is to open the detection hole in the means according to the first aspect to a projecting portion projecting from the mounting surface, and engage the detection opening on the control box side with the projecting portion. However, a means for opening the recess formed on the contact surface is adopted.

In order to achieve the above-mentioned object, the invention of claim 3 makes the detection hole in the means according to claim 1 open in a recess recessed from the mounting surface, and engages the detection opening on the control box side with the recess. A means for opening the protrusion formed on the contact surface is adopted.

In order to achieve the above-mentioned object, the invention of claim 4 forms the mounting surface in the means according to claim 1 at a portion which becomes substantially a side surface in the mounted state of the ventilation device, and A hook-shaped hooking part is provided on the upper part and a locking hole is provided on one side, and the locking part is locked on the mounting surface side and the protrusion is slidable in the lateral direction, and the engagement is engaged with the locking hole by sliding. The control box is provided with a protrusion, and means for enabling the control box to be engaged with and disengaged from the mounting surface by sliding.

In order to achieve the above object, the invention of claim 5 is such that the mounting surface in the means according to claim 1 is formed in a portion which becomes substantially a side surface in the mounted state of the ventilation device, and the terminal is provided in the lower part in the control box. A means for assembling circuit components necessary for installation work and maintenance operations such as a panel and display means for maintenance is adopted.

In order to achieve the above object, the invention of claim 6 provides a connection window for connecting to an external circuit and a confirmation window for visually recognizing the display means on the lower surface of the control box in the means according to claim 5. Adopt means to be provided.

In order to achieve the above object, the invention of claim 7 provides a detection tube for connecting the pressure sensor and the detection port to the back surface of the circuit board provided in the control box in the means according to claim 1. A means for disposing a protective sheet is provided between the circuit board and the detection tube.

[0014]

According to the above-mentioned means, the control circuit for controlling the blower and the pressure sensor are housed in the control box, and are detachably attached to a part of the outer surface of the intake structure for the blower. Therefore, the main body including the intake structure, the exhaust structure, and the blower can be made smaller than the one in which the control circuit and the pressure sensor are incorporated, and the control circuit does not have to be exposed to the intake airflow. Then, by mounting the control box with its contact surface facing the mounting surface of the intake structure, the pressure sensor in the control box becomes functional.

According to the second aspect of the present invention, the control box can be attached at an appropriate position by engaging the projection of the attachment surface with the concave portion of the contact surface in addition to the operation according to the first aspect. Further, the control box can be configured as a simple box body without a protruding portion, and the detection opening of the control box is less likely to be damaged by the concave portion.

According to the third aspect of the present invention, the control box can be mounted at an appropriate position by engaging the concave portion of the mounting surface with the projection of the contact surface in addition to the operation of the first aspect. Further, the detection opening on the contact surface is protected by the protrusion.

According to the fourth aspect of the present invention, in addition to the function according to the first aspect, the mounting surface is substantially a side surface in the mounted state, and the control box can be engaged with and disengaged from the mounting surface by locking and sliding. Even when the control box is mounted on the ceiling, the control box can be securely engaged and disengaged from the indoor side in a state where the control box is difficult to be hooked and fall.

In the means according to the fifth aspect, in addition to the function according to the first aspect, the wiring-related work and the maintenance operation necessary for the installation can be collectively performed from the inside of the room when it is mounted on the ceiling. .

In the means according to the sixth aspect, in addition to the operation according to the fifth aspect, it is possible to perform confirmation work for visually confirming the display means for maintenance from the inside of the room through the wiring work and the confirmation window.

In the means according to claim 7, in addition to the action according to claim 1, the circuit board and the detection tube are solid without any fear of damage to the detection tube due to a lead or the like protruding to the back surface of the circuit board by a protective sheet. Can be placed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The ventilator of this embodiment is installed in a space above the ceiling, and its main body 1 has one exhaust structure 2 for exhaust as shown in FIGS. Intake structure 3, 4, 5)
And a blower device incorporating a blower 6 that forms a ventilation flow from the intake structure 3, 4, 5 side to the exhaust structure 2 side. The intake structures 3, 4 and 5 have the same structure, and as shown in FIG. 3, an air volume adjusting plate 7 for adjusting the ventilation area of the intake air passage formed inside each of them sets the opening stepwise. It is provided so that it can be attached to each of the three sides of a rectangular box-shaped blower, and is connected to each zone of the house through ducts 8. The exhaust structure 2 is attached to the other side of the blower,
It is communicated to the outside through the duct 8. Each intake structure 3,
4 and 5 are located on the downstream side of the air volume adjusting plates 7 in the intake air passage,
Each of the electric dampers 9 is provided that opens and closes the portion and maintains a small ventilation area even in the closed position.

As shown in FIG. 3, the outer surfaces of the intake structures 3, 4 and 5 have a vertical surface configuration, and the air volume adjusting plate 7 is provided on one side surface thereof.
The mounting surface 10 is formed so as to straddle. The control box 1 is attached to one mounting surface 10 of the intake structures 3, 4, and 5.
1 is detachably attached. A concave portion 12 is formed in the lateral direction at the center of the mounting surface 10, and two laterally long detection holes 13 are formed at a position of the concave portion 12 straddling the air volume adjusting plate 7. These detection holes 13 are opened in the intake air passages on the upstream side and the downstream side of the air volume adjusting plate 7, respectively. The control box 11 is formed in a rectangular shape, and its back surface is joined to the mounting surface 10 as a contact surface 14. Inside the control box 11, a pressure sensor 15 for detecting a pressure difference between the upstream side and the downstream side of the intake air passage, and a blower so that the pressure difference detected by the pressure sensor 15 matches a preset target value. A control circuit for controlling 6 is incorporated. Two detection ports 1 of built-in pressure sensor 15
6 is opened to a projecting portion 17 projecting on the contact surface 14 of the control box 11, and by mounting the control box 11 on the mounting surface 10, the projecting portion 17 is engaged with the detection hole 13 to establish a functional connection state. become. The relationship between the air volume passing through the intake structure 3 and the pressure difference between the upstream side and the downstream side of the air volume adjusting plate 7 becomes an exponential function, and a differential pressure corresponding to the air volume passing appears. Therefore,
The pressure sensor 15 is a means for detecting the amount of air flowing through the intake structure 3.

The control box 11 is attached to the intake structure 3 by
As shown in FIGS. 3 and 4, it is carried out by latching and screwing. That is, the control box 11 has its contact surface 14
A hooking portion 18 having a downward hook by cutting and raising at the upper part, a hooking portion 19 having a lateral hook by cutting and raising at the upper side, and a locking hole 20 formed on one side surface, respectively. . On the other hand, on the mounting surface 10 side, the mounting surface 10
A protrusion 22 having a stopper portion 21 is formed upward at the center upper edge of the, and an engagement protrusion 23 is formed in the rear portion of the attachment surface 10 on the blower side. A receiving portion 24 having a screw insertion hole is formed below the mounting surface 10.

The contact surface 14 of the control box 11 is made to face the mounting surface 10, the detection holes 16 of the mounting surface 10 are made to correspond to the respective detection ports 16, and the hooking portions 18 are hooked on the protrusions 22 on the upper edge, and the mounting surface is made. While aligning 10 and the contact surface 14, the control box 11 is slid toward the air blower side until it is stopped by the stopper portion 21. As a result, the engagement protrusion 23 engages with the locking hole 20,
The hooking portion 19 having a sideways hook hits the step 25 at the edge of the mounting surface 10, and the control box 11 is positioned and temporarily attached without fear of falling. Finally, from the bottom of the control box 11 to the receiving part 2
The control box 11 is firmly fixed to the mounting surface 10 of the intake structure 3 by tightening the screws 26 on the control box 4. In this state, the pressure sensor 15 of the control box 11 is placed in a functional state. The control box 11 can be removed by reversing the above procedure. When the main body 1 is mounted on the ceiling, the control box 11 can be operated with one hand when the main body 1 is mounted on the ceiling, and the work can be performed from the indoor side without fear of dropping. It is convenient and convenient.

The detection port 16 provided on the contact surface 14 of the control box 11 is protected by the protrusion 17 and is hardly crushed. However, as shown in FIG. By opening the protrusion 27 protruding from the mounting surface 10 and opening the detection opening 16 in the recess 28 retracting from the contact surface 14, the detection opening 16 is protected and the projection 27 is formed.
The engagement between the detection hole 13 and the detection opening 16 is facilitated by the engagement between the detection hole 13 and the recess 28. Further, since the control box 11 is a simple box body having no protruding portion, the control box 11 can be easily operated and assembled during assembly and assembly.

Next, the structure of the control box 11 itself will be described with reference to FIGS. The control box 11 includes a base case 29 that forms the contact surface 14 and a cover case 30 that covers the contact surface 14. A pressure sensor 15 is attached to the inner surface of the base case 29. Between the pressure sensor 15 and each detection port 16 is a detection tube 31 made of silicon rubber or the like.
Have been contacted by. A first circuit board 32, which constitutes a control circuit, is mounted on top of this, and a second circuit board 33, which is mounted on the cover case 30, is stacked on top of it, forming a three-dimensional structure. A thin film protective sheet 34 is sandwiched between the first circuit board 32 and the detection tube 31 so that the detection tube 31 is not damaged by a lead protruding on the back surface of the first circuit board 32. There is. Therefore, the contact surface 14 of the control box 11 can be made smaller in accordance with the mounting surface 10 of the intake structure 3, 4, 5 which is not so wide.

The terminal board 3 is provided at the lower end of the first circuit board 32.
5, the circuit components necessary for the installation work such as the display means 36 for maintenance and the maintenance operation are collectively arranged at the lower end portion of the second circuit board 33. Then, on the lower surface of the control box 11, a connection window 37 for connection with an external circuit is provided.
Then, a confirmation window 38 for viewing the display means 36 is opened,
With the control box 11 mounted, wiring operation and confirmation work of the display means 36 can be performed from the indoor side. By connecting the output line of the control circuit to the motor of the blower 6 or the electric damper 9, the ventilation device can be made to perform a desired ventilation function.

That is, the output of the pressure sensor 15 is input to the control circuit. The control circuit is composed of comparing means for comparing the output of the pressure sensor 15 with the reference signal set by the setting means, and blower driving means such as an inverter for directly controlling the blower 6 by receiving the output of the comparing means. The control function of this control circuit is feedback control, and drives and controls the motor of the blower 6 to be controlled so that there is no difference between the output of the pressure sensor 15 and the reference signal. That is, the blower 6 is controlled so that the amount of air passing through the one intake structure 3 of the blower becomes constant. The reference signal can be varied to any value by the adjusting means connected to the setting means for outputting the reference signal.

In this ventilator, since the structural members related to the control are integrated in the control box 11 and attached externally to the main body 1, the main body 1 can be made smaller than when incorporated in the main body 1, and the control circuit It has the feature that it can avoid failures due to moisture. The intake structures 3, 4, 5 are not limited to the three ventilation devices, and the above-described configuration can be adopted as long as the ventilation device has one or more ventilation devices.

[0030]

As is apparent from the above description of the embodiment, according to the invention of claim 1, the control circuit for controlling the blower and the pressure sensor are housed in the control box, and the outer structure of the intake structure to the blower is shown. Since it is detachably attached to part of the
The main body composed of the intake structure, the exhaust structure, and the blower can be made smaller than a control circuit or pressure sensor is incorporated, and the control circuit does not have to be exposed to the intake air flow, so that a failure related to control can be avoided. In addition, the contact surface of the control box
Since the pressure sensor in the control box can be placed in a functional state by mounting it so as to face the mounting surface of the intake structure, the assemblability and the assemblability are improved.

According to the invention of claim 2, in addition to the effect according to the invention of claim 1, the control box can be mounted at an appropriate position by engaging the projection of the mounting surface with the recess of the contact surface, and controlling the control box. Since the box can be configured as a simple box having no protruding portion, the detection opening of the control box is less likely to be damaged by the recess, and the assembling and assembling properties are further improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, by engaging the projection of the contact surface with the recess of the mounting surface, the control box can be mounted at an appropriate position. In addition to improving the sticking property, the detection port on the contact surface can be protected by the protrusion.

According to the invention of claim 4, in addition to the effect according to the invention of claim 1, the mounting surface is in a portion which is substantially a side surface in the mounted state, and the control box can be engaged with and disengaged from the mounting surface by locking and sliding. Therefore, even when the control box is mounted on the ceiling, the engagement / disengagement operation of the control box can be reliably performed from the indoor side in a state in which the control box is difficult to be hooked and fall, and the mountability is improved.

According to the invention of claim 5, in addition to the effect of the invention of claim 1, when mounting on the back of the ceiling, wiring-related work and maintenance operations necessary for installation can be collectively performed from the indoor side. It is possible to improve the mountability.

According to the invention of claim 6, in addition to the effect of the invention of claim 5, it is possible to perform a confirming work for visually confirming the display means for maintenance through the wiring work and the confirming window from the inside of the room. improves.

According to the invention of claim 7, in addition to the effect of the invention of claim 1, the circuit board and the detection tube are provided.
The protective sheet allows the detection tube to be three-dimensionally arranged without fear of being damaged by a lead protruding to the back surface of the circuit board, thus reducing the plane area of the control box.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a configuration of a ventilation device as an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the configuration of the ventilation device of the embodiment.

FIG. 3 is a perspective view independently showing the intake structure of the ventilation device of the embodiment.

FIG. 4 is a side view showing a control box of the ventilation device according to the embodiment.

FIG. 5 is a bottom view of the control box of the embodiment.

FIG. 6 is an enlarged cross-sectional view of a main part showing another embodiment regarding the relationship between the control box and the mounting surface.

FIG. 7 is an exploded perspective view of the control box of the embodiment.

FIG. 8 is a configuration diagram showing a conventional ventilation device.

[Explanation of symbols]

1 body 2 exhaust structure 3 Intake structure 4 Intake structure 5 Intake structure 6 blower 10 Mounting surface 11 control box 12 recess 13 Detection hole 14 contact surface 15 Pressure sensor 16 Detection port 17 Projection 18 Hook 20 locking hole 22 protrusion 23 Engagement protrusion 27 Projection 28 recess 31 Detection tube 32 First circuit board 34 Protective sheet 35 terminal board 36 display means 37 Connection window 38 Confirmation window

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisao Hasegawa 1-3 Komaba-cho, Nakatsugawa-shi, Gifu Mitsubishi Electric Corporation Nakatsugawa Works (56) Reference JP-A-1-239330 (JP, A) Showa 59-195043 (JP, A) Actual development Showa 57-119224 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F ^7/ 00-7/06

Claims (7)

(57) [Claims] 1. The above-mentioned intake structure of a main body provided with an exhaust structure for exhaust, an intake structure for intake, and a blower forming a ventilation flow from this intake structure side to the exhaust structure side. , A pressure sensor for detecting a pressure difference between the upstream side and the downstream side of the intake air passage is provided, and the blower is controlled so that the pressure difference detected by the pressure sensor matches a preset target value. A ventilation device configured to control the blower by forming a mounting surface on a part of the outer surface of the intake structure and opening a detection hole for detecting a pressure difference in the mounting surface. The circuit and the pressure sensor are housed in a control box configured to be attachable to and detachable from the mounting surface, and a detection port for pressure detection that communicates with the pressure sensor is provided on the contact surface facing the mounting surface of the control box. Arranged,
A ventilator characterized in that the detection opening is provided with a control box mounted on the mounting surface so that the detection opening has a functional connection. 2. The ventilation device according to claim 1, wherein the detection hole is opened in a protrusion protruding from the mounting surface, and the detection opening on the control box side is engaged with the protrusion formed on the contact surface. A ventilation device characterized by being opened to a recess. 3. The ventilation device according to claim 1, wherein the detection hole is opened in a recess recessed from the mounting surface, and the detection opening on the control box side is engaged with the recess formed in the contact surface. Ventilation device characterized by opening to. 4. The ventilation device according to claim 1, wherein the attachment surface is formed to be a substantially side surface when the ventilation device is attached, and a hook-shaped hooking portion is provided on an upper portion of a contact surface side of the control box. A locking hole is provided on one side, and a projection that can be slid laterally by the locking portion is provided on the mounting surface side, and an engagement projection that engages with the locking hole by sliding, Ventilation device characterized in that the control box can be engaged and disengaged by hanging it on the mounting surface and sliding it. 5. The ventilation device according to claim 1, wherein the mounting surface is formed in a portion that is substantially a side surface when the ventilation device is mounted, and a terminal board, a display means for maintenance, and the like are provided in a lower portion of the control box. Ventilation device characterized by gathering the circuit components necessary for installation work and maintenance operation. 6. The ventilation device according to claim 5, wherein the control box has a lower surface provided with a connection window for connecting to an external circuit and a confirmation window through which the display means can be visually confirmed. apparatus. 7. The ventilation device according to claim 1, wherein a detection tube that connects the pressure sensor to the detection port is provided on the back surface of the circuit board provided in the control box, and A ventilation device comprising a protective sheet interposed between the detection tube and the detection tube.